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package mx.itschapala.dsw2.biblioteca8a.DAO;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import mx.itschapala.dsw2.biblioteca8a.modelo.Categoria;

/**
 *
 * @author z
 */
@Stateless
public class CategoriaDao extends AbstractDao<Categoria> implements CategoriaDaoLocal {
    @PersistenceContext(unitName = "biblioteca8a-ejbPU")
    private EntityManager em;

    @Override
    protected EntityManager getEntityManager() {
        return em;
    }

    public CategoriaDao() {
        super(Categoria.class);
    }
     @Override
    public boolean findDuplicity(Categoria category) {
        Query q = em.createNamedQuery("Categoria.findByClave");
        //poner parametro
        q.setParameter("nombre", category.getClave());
        //ejecutar  la  consulta
         return !q.getResultList().isEmpty();
    }

}
